Experimental heat release analysis and emissions of a HSDI diesel engine fueled with ethanol–diesel fuel blends

Rakopoulos, C.D.; Antonopoulos, K.A.; Rakopoulos, Dimitrios C.

doi:10.1016/j.energy.2007.03.005

Cited by 281 publications

(100 citation statements)

References 57 publications

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“…As known, concerning the study of the combustion process in internal combustion engines, a very important means to analyze combustion characteristics is the calculation and analysis of heat release rates according to actual measurements of pressures in the chamber [45]. Using the numerical and measured data, the net heat release rate can be calculated for the present hydrogen-fueled spark-ignition engine [2].…”

Section: Investigation Of Net Heat Release Ratementioning

confidence: 99%

A combined experimental and numerical study of thermal processes, performance and nitric oxide emissions in a hydrogen-fueled spark-ignition engine

Rakopoulos

Kosmadakis

Demuynck

et al. 2011

International Journal of Hydrogen Energy

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A COMBINED EXPERIMENTAL AND NUMERICAL STUDY OF THERMAL PROCESSES, PERFORMANCE AND NITRIC OXIDE EMISSIONS IN A HYDROGEN-FUELED SPARK-IGNITION ENGINE ABSTRACTThis work concerns the study of a spark-ignition engine fueled with hydrogen, using both measured and numerical data at various conditions, focusing on the combustion efficiency, the heat transfer phenomena and heat loss to the cylinder walls, the performance, as well as the nitric oxide (NO) emissions formed, when the fuel/air and compression ratio are varied. For the investigation of the heat transfer mechanism, the local wall temperatures and heat flux rates were measured at three locations of the cylinder liner in a CFR engine. These fluxes can provide a reliable estimation of the total heat loss through the cylinder walls and of the hydrogen flame arrival at specific locations. Together with the experimental analysis, the numerical results obtained from a validated in-house CFD code were utilized for gaining a more complete view of the heat transfer mechanism and the hydrogen combustion efficiency for the various cases examined. The performance of the CFR engine is then identified, since the calculated cylinder pressures are compared with the measured ones, from which performance and heat release rates are calculated and discussed. Further, NO emission studies have been accomplished, with the calculated results not only being compared with the measured exhaust NO ones, but also further processed for conducting an in-depth investigation of the dependence of NO production on the spatial distribution of in-cylinder gas temperature. It is revealed that for lower fuel/air ratio the burned gas temperature is held at low level and the heat loss ratio is quite low. As the load increases and stoichiometric mixtures are used, the wall and in-cylinder gas temperatures increase substantially, together with the heat loss and the NO emissions, owing to the high hydrogen combustion velocity and the consequent high rate of temperature rise. The combustion efficiency is slightly increased, but the indicated efficiency is decreased due to higher heat loss.Keywords: hydrogen; spark-ignition engine; combustion efficiency; heat transfer; NO emissions.

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Section: Investigation Of Net Heat Release Ratementioning

confidence: 99%

A combined experimental and numerical study of thermal processes, performance and nitric oxide emissions in a hydrogen-fueled spark-ignition engine

Rakopoulos

Kosmadakis

Demuynck

et al. 2011

International Journal of Hydrogen Energy

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“…Engine tests were run on the same engine in the same day in order to have the same atmospheric conditions (96 kPa pressure and 29 o C) within the three repetitions of each test and average of measured values were taken [5][6][7][8][9][10][11][12]. …”

Section: Engine Testsmentioning

confidence: 99%

Effect of biodiesel and alkyl ether on diesel engine emissions and performances

Cursaru¹,

sescu²,

Rd³

et al. 2011

WIT Transactions on Ecology and the Environment

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Over the last years numerous attempts have been made to minimize the amount of toxic and harmful exhaust gases from diesel powered vehicles. The rapidly exhausted fossil sources coupled with increasing price of petroleum together with the public awareness concerning the environmental protection, are the main reasons that have made many scientists to search for alternative and renewable energy sources.According to the recent EU regulations starting with 1 st of January 2010, 5.75wt% of classical diesel fuel must be replaced with more environmental friendly fuels. The most used biofuel is biodiesel (fatty acid methyl esters), mainly synthesized by catalytic transesterification of fatty glycerides. Roughly 10 wt% of glycerol is obtained as by-product in catalytic transesterification of fatty glycerides and there are many researching directions in order to find new applications for the increasing availability of glycerol as a low-cost feedstock.In our study we have tested the energetic and ecologic performances (the exhaust emissions as CO, CO 2 and NO x ) of biodiesel or alkyl ether-diesel blends by testing the fuels on a Diesel engine 392-L4-DT/104 at different engine speeds. The emission tests were measured by using a FTIR SESAM 1.4 equipment.Engine tests were run on the same engine in the same day in order to have the same atmospheric conditions (96 kPa pressure and 29 o C) within the three repetitions of each test and average of measured values were taken.The measured CO emissions of biodiesel and alkyl ether-diesel blends were found to be 15% and 37% lower than that of diesel fuel, respectively.

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“…The fumigation reduces oxides of nitrogen effectively also soot reduction is commendable. Fumigating fuel should have the boiling point temperature must between 50˚ C-80˚ C and more number of bonds and also have large number of carbon chain 13 . These oxygenated fuels does not blend with diesel effectively, because of that it is mixed with air in the intake systems 14 .…”

Section: Introductionmentioning

confidence: 99%

Chemical and Experimental Analysis of Fumigation Process to Reduce Emission without Affecting the Performance of an Engine

2017

Rasayan J Chem

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Diesel engines have been widely used for better efficiency and low emissions, but diesel engine produces more smoke, particulate matter and oxides of nitrogen and reducing all these emissions simultaneously is not possible as on today due to trade of between oxides of nitrogen and smoke. Engines emission can be decreased by employing fumigation. Using fumigation process emission composition can be reduced when compared to normal operation. In this work an attempt has been made to reduce oxides of nitrogen, hydrocarbon and carbon monoxide using methanol fuel in the combustion chamber. The chemical behaviors and reactions of methanol over hydrocarbons also analyzed. A single cylinder four stroke, 5hp, direct injection, engine test rig was used for experiment purpose. From the experimental analysis, it was found that alcoholic fuels can effectively be used in diesel engines with methanol fumigation using EFI kit that normally operates at high power outputs. The result shows that brake thermal efficiency is slightly decreased when compared without modification at all flow rates.

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Experimental heat release analysis and emissions of a HSDI diesel engine fueled with ethanol–diesel fuel blends

Cited by 281 publications

References 57 publications

A combined experimental and numerical study of thermal processes, performance and nitric oxide emissions in a hydrogen-fueled spark-ignition engine

A combined experimental and numerical study of thermal processes, performance and nitric oxide emissions in a hydrogen-fueled spark-ignition engine

Effect of biodiesel and alkyl ether on diesel engine emissions and performances

Chemical and Experimental Analysis of Fumigation Process to Reduce Emission without Affecting the Performance of an Engine

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